Method for determining transmission parameters of uplink signal, terminal and network device

ABSTRACT

Provided are methods for determining a transmission parameter of an uplink signal, a terminal and a network device. The method includes that: a terminal determines a first SRS resource set receives, from a network device, first indication information which is for instructing the terminal to transmit an aperiodic SRS, determines a target SRS resource set according to the first indication information and the first SRS resource set, sends the aperiodic SRS to the network device on an SRS resource in the target SRS resource set, receives, from the network device, second indication information which is for indicating a target SRS resource in the target SRS resource set; and the terminal determines a transmission parameter used to transmit an uplink signal according to the target SRS resource.

CROSS-REFERENCE TO RELATED APPLICATIONS

This is a continuation application of U.S. patent application Ser. No.16/672,359, filed on Nov. 1, 2019, which is a continuation of PCTApplication No. PCT/CN2017/083083, filed on May 4, 2017 and named after“METHOD FOR DETERMINING TRANSMISSION PARAMETERS OF UPLINK SIGNAL,TERMINAL AND NETWORK DEVICE”, the contents of which are herebyincorporated by reference in their entireties.

BACKGROUND

In an existing communication system, a mechanism for transmitting anaperiodic Sounding Reference Signal (SRS) is introduced, and a basestation may trigger a terminal through Downlink Control Information(DCI) to transmit an aperiodic SRS. An SRS is transmitted to estimateuplink channel quality of different frequency bands such that a networkdevice allocates a transmission resource in a relatively good transientchannel state to a terminal for uplink signal transmission.

However, in the existing communication system, a large number of SRSresources are configured for transmission of an aperiodic SRS, and ifthe SRS is only configured for estimating a transient channel state,reasonability in use of the SRS resources is reduced to a certain extentto cause SRS resource waste.

SUMMARY

The application relates to the field of communications, and moreparticularly to a method for determining a transmission parameter of anuplink signal, a terminal and a network device.

Embodiments of the application provide methods for determining atransmission parameter of an uplink signal, a terminal and a networkdevice, to reasonably use an SRS resource and reduce SRS resource waste.

A first aspect provides a method for determining a transmissionparameter of an uplink signal, which includes that: a terminaldetermines a first SRS resource set; the terminal receives firstindication information sent by a network device, the first indicationinformation being used to instruct the terminal to transmit an aperiodicSRS; the terminal determines a target SRS resource set according to thefirst indication information and the first SRS resource set; theterminal sends the aperiodic SRS to the network device on an SRSresource in the target SRS resource set; the terminal receives secondindication information sent by the network device, the second indicationinformation being used to indicate a target SRS resource in the targetSRS resource set; and the terminal determines a transmission parameterused to transmit an uplink signal according to the target SRS resource.

In the embodiments of the application, the terminal may determine thetransmission parameter used to transmit the uplink signal according tothe target SRS resource, so that the condition in a conventional artthat an SRS resource may only be configured to transmit an SRS toestimate a channel state is avoided, the SRS resource may be reasonablyused, and SRS resource waste is avoided.

Furthermore, the SRS is sent on the SRS resource in the target SRSresource set for channel estimation, the target SRS resource isdetermined, and the transmission parameter used for the terminal totransmit the uplink signal is determined according to the target SRSresource, so that improvement in accuracy of the transmission parameterdetermined by the terminal to transmit the uplink signal is facilitated.

In combination with the first aspect, in some possible implementationmodes, the first indication information may be used to indicate thetarget SRS resource set, and the operation that the terminal determinesthe target SRS resource set according to the first indicationinformation and the first SRS resource set may include that: theterminal determines the target SRS resource set from the first SRSresource set according to the first indication information, the targetSRS resource set being a subset of the first SRS resource set.

In combination with the first aspect, in some possible implementationmodes, the first indication information may be used to indicate a firstSRS resource in the first SRS resource set, and the operation that theterminal determines the target SRS resource set according to the firstindication information and the first SRS resource set may include that:the terminal determines the first SRS resource from the first SRSresource set according to the first indication information; and theterminal determines a second SRS resource set corresponding to the firstSRS resource as the target resource set according to the first SRSresource and a corresponding relationship between each SRS resource inthe first SRS resource set and a second SRS resource set.

In combination with the first aspect, in some possible implementationmodes, different SRS resources in the first SRS resource set maycorrespond to different second SRS resource sets.

In combination with the first aspect, in some possible implementationmodes, the first indication information may be used to indicate a secondSRS resource in the first SRS resource set, and the operation that theterminal determines the target SRS resource set according to the firstindication information and the first SRS resource set may include that:the terminal determines an index of the second SRS resource in the firstSRS resource set according to the first indication information and thefirst SRS resource set; the terminal determines an index setcorresponding to the second SRS resource according to the index of thesecond SRS resource in the first SRS resource set and a correspondingrelationship between an index of an SRS resource in the first SRSresource set and an index set; and the terminal determines that each SRSresources indicated by each index in the index set corresponding to thesecond SRS resource forms the target SRS resource set.

In combination with the first aspect, in some possible implementationmodes, different beams may be adopted for SRS transmission on differentSRS resources in the first SRS resource set.

In combination with the first aspect, in some possible implementationmodes, different beams may be adopted for SRS transmission on differentSRS resources in the target SRS resource set.

In combination with the first aspect, in some possible implementationmodes, the transmission parameter may be a beamforming weight, and theoperation that the terminal determines the transmission parameter usedto transmit the uplink signal according to the target SRS resource mayinclude that: the terminal determines a beamforming weight for SRStransmission on the target SRS resource as the beamforming weight fortransmission of the uplink signal.

In combination with the first aspect, in some possible implementationmodes, the transmission parameter may be a precoding matrix, and theoperation that the terminal determines the transmission parameter usedto transmit the uplink signal according to the target SRS resource mayinclude that: the terminal receives first Precoding Matrix Indicator(PMI) information sent by the network device; and the terminaldetermines a precoding matrix of the uplink signal through a mappingrelationship among an antenna port amount, PMI information and aprecoding matrix according to an antenna port amount of the target SRSresource and the first PMI information.

In combination with the first aspect, in some possible implementationmodes, after the operation that the terminal determines the first SRSresource set, the method may further include that: the terminal sends anSRS to the network device on the SRS resource in the first SRS resourceset.

In combination with the first aspect, in some possible implementationmodes, the operation that the terminal transmits the SRS on the SRSresource in the first SRS resource set may include that: the terminaltransmits the SRS on the SRS resource in the first SRS resource set, theSRS being a periodic SRS or a quasi-persistent SRS.

In combination with the first aspect, in some possible implementationmodes, the operation that the terminal sends the SRS to the networkdevice on the SRS resource in the first SRS resource set may includethat: the terminal sends the SRS to the network device on part ofantenna ports of the SRS resource in the first SRS resource set.

In combination with the first aspect, in some possible implementationmodes, the operation that the terminal determines the first SRS resourceset may include that: the terminal receives configuration informationsent by the network device, the configuration information being forconfiguring the first SRS resource set for the terminal.

In combination with the first aspect, in some possible implementationmodes, the configuration information may be born in high-layer signalingor Media Access Control (MAC) signaling.

In combination with the first aspect, in some possible implementationmodes, the operation that the terminal receives the second indicationinformation sent by the network device may include that: the terminalreceives, from the network device, DCI used to schedule the uplinksignal, the DCI containing the second indication information.

A second aspect provides a method for determining a transmissionparameter of an uplink signal, which may include that: a network devicereceives an SRS sent by a terminal on an SRS resource in a first SRSresource set; the network device determines first indication informationaccording to the SRS, the first indication information being furtherconfigured to determine a target SRS transmission resource; the networkdevice sends the first indication information to the terminal, the firstindication information being used to instruct the terminal to transmitan aperiodic SRS; the network device receives the aperiodic SRS from theterminal on an SRS resource in a target SRS resource set; the networkdevice determines a transmission parameter used for the terminal totransmit an uplink signal according to the target SRS resource; and thenetwork device sends second indication information to the terminal, thesecond indication information being used to indicate the target SRSresource in the target SRS resource set and the target SRS resourcebeing configured to determine the transmission parameter used for theterminal to transmit the uplink signal.

In the embodiments of the application, the terminal may determine thetransmission parameter used to transmit the uplink signal according tothe target SRS resource, so that the condition in a conventional artthat an SRS resource may only be configured to transmit an SRS toestimate a channel state is avoided, the SRS resource may be reasonablyused, and SRS resource waste is avoided.

Furthermore, the SRS is sent on the SRS resource in the target SRSresource set for channel estimation, the target SRS resource isdetermined, and the transmission parameter used for the terminal totransmit the uplink signal is determined according to the target SRSresource, so that improvement in accuracy of the transmission parameterdetermined by the terminal to transmit the uplink signal is facilitated.

In combination with the second aspect, in some possible implementationmodes, the first indication information may be used to indicate thetarget SRS resource set, and the target SRS resource set may be a subsetof the first SRS resource set.

In combination with the second aspect, in some possible implementationmodes, the first indication information may be used to indicate a firstSRS resource in the first SRS resource set, each SRS resource in thefirst SRS resource set may correspond to a second SRS resource set, andthe second SRS resource set corresponding to the first SRS resource maybe the target SRS resource set.

In combination with the second aspect, in some possible implementationmodes, the first indication information may be used to indicate a secondSRS resource in the first SRS resource set, an index of the second SRSresource in the first SRS resource set may correspond to an index set,and each SRS resource corresponding to each index in the index setcorresponding to the second SRS resource may form the target SRSresource set.

In combination with the second aspect, in some possible implementationmodes, different beams may be adopted for SRS transmission on differentSRS resources in the first SRS resource set.

In combination with the second aspect, in some possible implementationmodes, different beams may be adopted for SRS transmission on differentSRS resources in the target SRS resource set.

In combination with the second aspect, in some possible implementationmodes, the transmission parameter may be a beamforming weight, and abeamforming weight for SRS transmission on the target SRS resource maybe determined as the beamforming weight for transmission of the uplinksignal.

In combination with the second aspect, in some possible implementationmodes, the transmission parameter may be a precoding matrix, and themethod may further include that: the network device sends first PMIinformation to the terminal, the first PMI information and an antennaport amount of the target SRS resource indicating a precoding matrix ofuplink signal through a mapping relationship among an antenna portamount, PMI information and a precoding matrix.

In combination with the second aspect, in some possible implementationmodes, the operation that the network device receives the SRS from theterminal on the SRS resource in the first SRS resource set may includethat: the network device receives the SRS from the terminal on the SRSresource in the first SRS resource set, the SRS being a periodic SRS ora quasi-persistent SRS.

In combination with the second aspect, in some possible implementationmodes, the operation that the network device receives the SRS from theterminal on the SRS resource in the first SRS resource set may includethat: the network device receives the SRS from the terminal on part ofantenna ports of the SRS resource in the first SRS resource set.

In combination with the second aspect, in some possible implementationmodes, the method may further include that: the network device sendsconfiguration information to the terminal, the configuration informationbeing for configuring the first SRS resource set for the terminal.

A third aspect provides a terminal, which includes units configured toexecute the method in the first aspect.

A fourth aspect provides a network device, which includes unitsconfigured to execute the method in the second aspect.

A fifth aspect provides a terminal, which includes a memory, aprocessor, an input/output interface and a communication interface. Thememory, the processor, the input/output interface and the communicationinterface form communication connections, the memory is configured tostore an instruction, the processor is configured to execute theinstruction stored in the memory, and when the instruction is executed,the processor executes the method in the first aspect through thecommunication interface and controls the input/output interface toreceive input data and information and output data such as an operationresult.

A sixth aspect provides a network device, which includes a memory, aprocessor, an input/output interface and a communication interface. Thememory, the processor, the input/output interface and the communicationinterface form communication connections, the memory is configured tostore an instruction, the processor is configured to execute theinstruction stored in the memory, and when the instruction is executed,the processor executes the method in the second aspect through thecommunication interface and controls the input/output interface toreceive input data and information and output data such as an operationresult.

A seventh aspect provides a computer-readable medium, which stores aprogram code configured to be executed by a terminal device, the programcode including an instruction configured to execute the method in eachaspect.

An eighth aspect provides a computer program product including aninstruction, which runs on a computer to enable the computer to executethe method in each aspect.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a wireless communication system 100 to which the embodimentsof the application are applied.

FIG. 2 is a schematic flowchart of a method for determining atransmission parameter of an uplink signal according to an embodiment ofthe application.

FIG. 3 is a schematic flowchart of a method for determining atransmission parameter of an uplink signal according to an embodiment ofthe application.

FIG. 4 is a schematic block diagram of a terminal according to anembodiment of the application.

FIG. 5 is a schematic block diagram of a terminal according to anotherembodiment of the application.

FIG. 6 is a schematic block diagram of a network device according to anembodiment of the application.

FIG. 7 is a schematic block diagram of a terminal according to anotherembodiment of the application.

DETAILED DESCRIPTION

The technical solutions in the application will be described below incombination with the drawings.

FIG. 1 is a wireless communication system 100 to which the embodimentsof the application are applied. The wireless communication system 100may include a network device 110. The network device 110 may be a devicecapable of communicating with a terminal device. The network device 110may provide communication coverage for a specific geographical regionand may communicate with a terminal device in the coverage.

A network device and two terminals are exemplarily shown in FIG. 1 . thewireless communication system 100 may include multiple network devices,and there may be other number of terminals, except two terminals, incoverage of each network device. There are no limits made thereto in theembodiments of the application.

The wireless communication system 100 may further include other networkentities such as a network controller and a mobility management entity.There are no limits made thereto in the embodiments of the application.

It is to be understood that the technical solutions of the applicationmay be applied to various communication systems, for example, a GlobalSystem of Mobile Communication (GSM), a Code Division Multiple Access(CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system,a General Packet Radio Service (GPRS), an LTE system, an Advanced LongTerm Evolution (LTE-A) system, a Universal Mobile TelecommunicationSystem (UMTS), New Radio Access Technology (NR), and 5th-Generation(5G).

It is also to be understood that, in the embodiments of the application,the terminal device may include, but not limited to, a Mobile Station(MS), a mobile terminal, a mobile telephone, User Equipment (UE), ahandset, portable equipment and the like. The terminal device maycommunicate with one or more core networks through a Radio AccessNetwork (RAN). For example, the terminal device may be a mobile phone(or called a “cell” phone), a computer with a wireless communicationfunction and the like. The terminal device may also be a portable,pocket, handheld, computer-embedded or vehicle-mounted mobile device.

In the embodiments of the application, the network device may be anaccess network device and, for example, may be a base station, aTransmit and Receive Point (TRP) or an access point. The base stationmay be a Base Transceiver Station (BTS) in the GSM or CDMA, may also bea NodeB in WCDMA, may also be an Evolved Node B (eNB or e-NodeB) in LTEor may further be a gNB in NR or 5G. There are no specific limits madethereto in the embodiments of the application.

In a 5G communication system, SRSs include periodic SRSs andquasi-persistent SRSs. A periodic SRS may be continuously transmitted ona periodic SRS resource. For a quasi-persistent SRS, a terminal may becontrolled through activation and deactivation signaling to start orstop periodically transmitting the SRS.

An SRS may be configured to obtain Channel State Information (CSI), andmay also be configured for beam management. That is, the terminal mayadopt different beams to transmit SRSs on different SRS resources. Anetwork device may detect the SRS to determine and indicate a SRSresource for the SRS with relatively high receiving quality to theterminal. The terminal may adopt the beam for the SRS for subsequentuplink signal transmission.

For obtaining an “optimal beam” for transmitting an uplink signal, theterminal is required to use multiple different beams to transmit SRSs,and thus a large number of SRS resources are required to be configured.How to efficiently and accurately select a transmission parameter (forexample, beamforming weight) for the uplink signal by use of the SRSresources will be described.

FIG. 2 is a schematic flowchart of a method for determining atransmission parameter of an uplink signal according to an embodiment ofthe application. The method shown in FIG. 2 includes the followingoperations.

In the operation 210, a terminal determines a first SRS resource set.

The first SRS resource set includes at least one SRS resource, and theSRS resource may be a transmission resource configured to transmit anSRS.

Different beams are adopted for SRS transmission on different SRSresources in the first SRS resource set.

In the operation 220, the terminal receives first indication informationsent by a network device, the first indication information being used toinstruct the terminal to transmit an aperiodic SRS.

The aperiodic SRS may refer to an aperiodically transmitted SRS.

The first indication information may be determined as a triggeringinstruction of triggering the terminal to transmit the aperiodic SRS.

In the operation 230, the terminal determines a target SRS resource setaccording to the first indication information and the first SRS resourceset.

Different beams are adopted for SRS transmission on different SRSresources in the target SRS resource set.

Different beamforming weights are adopted for sending SRSs on differentSRS resources in the target SRS resource set.

As an embodiment, the first indication information is used to indicatethe target SRS resource set, and the operation 230 may include that: theterminal determines the target SRS resource set from the first SRSresource set according to the first indication information, the targetSRS resource set being a subset of the first SRS resource set.

The operation that the terminal determines the target SRS resource setfrom the first SRS resource set according to the first indicationinformation may refer to that the terminal may select from the first SRSresource set a transmission resource belonging to the target SRSresource set according to the target SRS resource set indicated by thefirst indication information.

For example, the first indication information may indicate the targetSRS resource set through a bitmap. Each bit in the bitmap may correspondto an SRS resource, or each bit in the bitmap may correspond to an SRSresource region.

For another example, the first indication information may also indicatethe target SRS resource set through an index of an SRS resource in thefirst SRS resource set.

As an embodiment, the first indication information is used to indicate afirst SRS resource in the first SRS resource set, and the operation 230may include that: the terminal determines the first SRS resource fromthe first SRS resource set according to the first indicationinformation; and the terminal determines a second SRS resource setcorresponding to the first SRS resource as the target resource setaccording to the first SRS resource and a corresponding relationshipbetween each SRS resource in the first SRS resource set and a second SRSresource set.

Different SRS resources in the first SRS resource set correspond todifferent second SRS resource sets.

For example, SRSs are sent on SRS resources in the first SRS resourceset through wide beams, the network device may select a wide beam withrelatively high SRS transmission quality as the first SRS resourceaccording to the SRSs sent on the SRS resources in the first SRSresource set, and the terminal determines the SRS resource correspondingto at least one narrow beam in the same direction with the wide beam asa transmission resource in the second SRS resource set according to thewide beam.

As an embodiment, the first indication information is used to indicate asecond SRS resource in the first SRS resource set, and the operation 230may include that: the terminal determines an index of the second SRSresource in the first SRS resource set according to the first indicationinformation and the first SRS resource set; the terminal determines anindex set corresponding to the second SRS resource according to theindex of the second SRS resource in the first SRS resource set and acorresponding relationship between an index of an SRS resource in thefirst SRS resource set and an index set; and the terminal determinesthat SRS resources indicated by indexes in the index set correspondingto the second SRS resource form the target SRS resource set.

For example, the index of the first SRS resource in the first SRSresource set is k, the index set corresponding to the index k is {k,k+1, k+2, k+3}, and then the terminal may determine the SRS resource inthe second SRS resource set according to each index in the index set.

It is to be noted that the corresponding relationship between the indexof the SRS resource in the first SRS resource set and the index set maybe pre-configured for the terminal by the network device, or may also bepredetermined by the network device and the terminal through acommunication protocol. There are no limits made thereto in theembodiment of the application.

In the operation 240, the terminal sends the aperiodic SRS to thenetwork device on an SRS resource in the target SRS resource set.

In the operation 250, the terminal receives second indicationinformation sent by the network device, the second indicationinformation being used to indicate a target SRS resource in the targetSRS resource set.

The network device may determine a SRS resource for transmitting asignal better in the target SRS resource set as the target SRS resourceaccording to the aperiodic SRS sent by the terminal in the target SRSresource set, and may indicate the SRS resource to the terminal throughthe second indication information.

As an embodiment, the operation that the terminal receives the secondindication information sent by the network device may include that: theterminal receives DCI used to schedule the uplink signal from thenetwork device, the DCI containing the second indication information.

In the operation 260, the terminal determines a transmission parameterused to transmit an uplink signal according to the target SRS resource.

It is to be noted that the transmission parameter may include at leastone of the following parameters: a beamforming weight, precodingindication information, an antenna panel for transmission of an uplinksignal, an antenna port for transmission of an uplink signal, a layernumber for uplink transmission, a modulation and coding scheme foruplink transmission and the like. There are no specific limits madethereto in the embodiment of the application.

In the embodiment of the application, the terminal may determine thetransmission parameter used to transmit the uplink signal according tothe target SRS resource, so that the condition in a conventional artthat an SRS resource may only be configured to transmit an SRS toestimate a channel state is avoided, the SRS resource may be reasonablyused, and SRS resource waste is avoided.

Furthermore, the SRS is sent on the SRS resource in the target SRSresource set for channel estimation, the target SRS resource isdetermined, and the transmission parameter used for the terminal totransmit the uplink signal is determined according to the target SRSresource, so that improvement in accuracy of the transmission parameterdetermined by the terminal to transmit the uplink signal is facilitated.

As an embodiment, the transmission parameter is a beamforming weight,and the operation 260 may include that: the terminal determines abeamforming weight for SRS transmission on the target SRS resource asthe beamforming weight for transmission of the uplink signal.

The network device may determine the SRS resource for transmitting asignal better in the target SRS resource set as the target SRS resourceaccording to the aperiodic SRS sent by the terminal in the target SRSresource set.

Determining the beamforming weight for SRS transmission on the targetSRS resource as the beamforming weight for transmission of the uplinksignal is favorable for improving the accuracy of the beamforming weightdetermined by the terminal to transmit the uplink signal and, meanwhile,obtaining uplink CSI on the basis of the selected beamforming weight.

As an embodiment, the transmission parameter is a precoding matrix, andthe operation 260 may include that: the terminal receives firstPrecoding Matrix Indicator (PMI) information sent by the network device;and the terminal determines the precoding matrix of the uplink signalthrough a mapping relationship among an antenna port amount, PMIinformation and a precoding matrix according to an antenna port amountof the target SRS resource and the first PMI information.

As an embodiment, after the operation that the terminal determines thefirst SRS resource set, the method may further include that: theterminal sends an SRS to the network device on the SRS resource in thefirst SRS resource set.

The terminal sends the SRS to the network device through the SRSresource in the first SRS resource set such that the network device mayperform channel estimation according to the SRS to determine the targetSRS resource set.

As an embodiment, the operation that the terminal transmits the SRS onthe SRS resource in the first SRS resource set may include that: theterminal transmits the SRS on the SRS resource in the first SRS resourceset, the SRS being a periodic SRS or a quasi-persistent SRS.

It is to be noted that, since a general direction of a beam changesslowly, time occupied by each period during which the terminalperiodically sends the SRS on the SRS resource in the first SRS resourceset may be relatively long, that is, the terminal is not required tofrequently send the SRS on the SRS resource in the first SRS resourceset, so that the target SRS resource set may be selected with arelatively low resource overhead.

As an embodiment, the operation that the terminal sends the SRS to thenetwork device on the SRS resource in the first SRS resource set mayinclude that: the terminal sends the SRS to the network device on partof antenna ports of the SRS resource in the first SRS resource set.

For example, the terminal may adopt only one antenna port of the SRSresource in the first SRS resource set to transmit the SRS.

The SRS is transmitted on part of antenna ports of the SRS resource inthe first SRS resource set, so that the resource overhead for SRStransmission is reduced.

As an embodiment, the operation that the terminal determines the firstSRS resource set may include that: the terminal receives configurationinformation sent by the network device, the configuration informationbeing for configuring the first SRS resource set for the terminal.

As an embodiment, the configuration information is indicated byhigh-layer signaling or MAC signaling. As an example, the configurationinformation is born in high-layer signaling or MAC signaling.

FIG. 3 is a schematic flowchart of a method for determining atransmission parameter of an uplink signal according to an embodiment ofthe application. The method shown in FIG. 3 includes the followingoperations.

In the operation 310, a network device receives an SRS from a terminalon an SRS resource in a first SRS resource set.

In the operation 320, the network device determines first indicationinformation according to the SRS, the first indication information beingfurther configured to determine a target SRS transmission resource.

In the operation 330, the network device sends the first indicationinformation to the terminal, the first indication information being usedto instruct the terminal to transmit an aperiodic SRS.

In the operation 340, the network device receives the aperiodic SRS fromthe terminal on an SRS resource in a target SRS resource set.

In the operation 350, the network device determines, according to thetarget SRS resource, a transmission parameter used for the terminal totransmit a uplink signal.

In the operation 360, the network device sends second indicationinformation to the terminal, the second indication information beingused to indicate the target SRS resource in the target SRS resource setand the target SRS resource being configured to determine thetransmission parameter used for the terminal to transmit the uplinksignal.

In the embodiment of the application, the terminal may determine thetransmission parameter used to transmit the uplink signal according tothe target SRS resource, so that the condition in a conventional artthat an SRS resource may only be configured to transmit an SRS toestimate a channel state is avoided, the SRS resource may be reasonablyused, and SRS resource waste is avoided.

Furthermore, the SRS is sent on the SRS resource in the target SRSresource set for channel estimation, the target SRS resource isdetermined, and the transmission parameter used for the terminal totransmit the uplink signal is determined according to the target SRSresource, so that improvement in accuracy of the transmission parameterdetermined by the terminal to transmit the uplink signal is facilitated.

As an embodiment, the first indication information is used to indicatethe target SRS resource set, and the target SRS resource set is a subsetof the first SRS resource set.

As an embodiment, the first indication information is used to indicate afirst SRS resource in the first SRS resource set, each SRS resource inthe first SRS resource set corresponds to a second SRS resource set, andthe second SRS resource set corresponding to the first SRS resource isthe target SRS resource set.

As an embodiment, different SRS resources in the first SRS resource setcorrespond to different second SRS resource sets.

As an embodiment, the first indication information is used to indicate asecond SRS resource in the first SRS resource set, an index of thesecond SRS resource in the first SRS resource set corresponds to anindex set, and SRS resources corresponding to indexes in the index setcorresponding to the second SRS resource form the target SRS resourceset.

As an embodiment, different beams are adopted for SRS transmission ondifferent SRS resources in the first SRS resource set.

As an embodiment, different beams are adopted for SRS transmission ondifferent SRS resources in the target SRS resource set.

As an embodiment, the transmission parameter is a beamforming weight,and a beamforming weight for SRS transmission on the target SRS resourceis determined as the beamforming weight for transmission of the uplinksignal.

As an embodiment, the transmission parameter is a precoding matrix, andthe method may further include that: the network device sends first PMIinformation to the terminal. The first PMI information and an antennaport amount of the target SRS resource indicate the precoding matrix ofthe uplink signal through a mapping relationship among an antenna portamount, PMI information and a precoding matrix.

As an embodiment, the operation that the network device receives the SRSfrom the terminal on the SRS resource in the first SRS resource set mayinclude that: the network device receives the SRS from the terminal onthe SRS resource in the first SRS resource set, the SRS being a periodicSRS or a quasi-persistent SRS.

As an embodiment, the operation that the network device receives the SRSfrom the terminal on the SRS resource in the first SRS resource set mayinclude that: the network device receives the SRS from the terminal onpart of antenna ports of the SRS resource in the first SRS resource set.

As an embodiment, the method may further include that: the networkdevice sends configuration information to the terminal, theconfiguration information being for configuring the first SRS resourceset for the terminal.

As an embodiment, the configuration information may be born inhigh-layer signaling or MAC signaling.

As an embodiment, the operation that the network device sends the secondindication information to the terminal may include that: the networkdevice sends DCI used to schedule the uplink signal to the terminal, theDCI containing the second indication information.

The methods for determining a transmission parameter of an uplink signalin the embodiments of the application are described above in combinationwith FIG. 1 to FIG. 3 in detail. A terminal and network device of theembodiments of the application will be described below in combinationwith FIG. 4 to FIG. 7 in detail. It is to be understood that the devicesshown in FIG. 4 to FIG. 7 may implement each operation in FIG. 2 andFIG. 3 and will not be elaborated herein for avoiding repetitions.

FIG. 4 is a schematic block diagram of a terminal according to anembodiment of the application. The terminal 400 shown in FIG. 4 includesa determination unit 410, a receiving unit 420 and a sending unit 430.

The determination unit is configured to determine a first SRS resourceset.

The receiving unit is configured to receive first indication informationsent by a network device, the first indication information being used toinstruct the terminal to transmit an aperiodic SRS.

The determination unit is further configured to determine a target SRSresource set according to the first indication information and the firstSRS resource set.

The sending unit is configured to send the aperiodic SRS to the networkdevice on an SRS resource in the target SRS resource set.

The receiving unit is further configured to receive second indicationinformation sent by the network device, the second indicationinformation being used to indicate a target SRS resource in the targetSRS resource set.

The determination unit is further configured to determine a transmissionparameter used to transmit an uplink signal according to the target SRSresource.

As an embodiment, the first indication information is used to indicatethe target SRS resource set, and the determination unit is specificallyconfigured to determine the target SRS resource set from the first SRSresource set according to the first indication information, the targetSRS resource set being a subset of the first SRS resource set.

As an embodiment, the first indication information is used to indicate afirst SRS resource in the first SRS resource set, and the determinationunit is configured to determine the first SRS resource from the firstSRS resource set according to the first indication information anddetermine a second SRS resource set corresponding to the first SRSresource as the target resource set according to the first SRS resourceand a corresponding relationship between each SRS resource in the firstSRS resource set and a second SRS resource set.

As an embodiment, different SRS resources in the first SRS resource setcorrespond to different second SRS resource sets.

As an embodiment, the first indication information is used to indicate asecond SRS resource in the first SRS resource set, and the determinationunit is configured to determine an index of the second SRS resource inthe first SRS resource set according to the first indication informationand the first SRS resource set, determine an index set corresponding tothe second SRS resource according to the index of the second SRSresource in the first SRS resource set and a corresponding relationshipbetween an index of an SRS resource in the first SRS resource set and anindex set, and determine that SRS resources indicated by indexes in theindex set corresponding to the second SRS resource form the target SRSresource set.

As an embodiment, different beams are adopted for SRS transmission ondifferent SRS resources in the first SRS resource set.

As an embodiment, different beams are adopted for SRS transmission ondifferent SRS resources in the target SRS resource set.

As an embodiment, the transmission parameter is a beamforming weight,and the determination unit is configured to determine a beamformingweight for SRS transmission on the target SRS resource as thebeamforming weight for transmission of the uplink signal.

As an embodiment, the transmission parameter is a precoding matrix, andthe determination unit is specifically configured to receive first PMIinformation sent by the network device and determine the precodingmatrix of the uplink signal through a mapping relationship among anantenna port amount, PMI information and a precoding matrix according toan antenna port amount of the target SRS resource and the first PMIinformation.

As an embodiment, the sending unit is further configured to send an SRSto the network device on the SRS resource in the first SRS resource set.

As an embodiment, the sending unit is further configured to transmit theSRS on the SRS resource in the first SRS resource set, the SRS being aperiodic SRS or a quasi-persistent SRS.

As an embodiment, the sending unit is further configured to send the SRSto the network device on part of antenna ports of the SRS resource inthe first SRS resource set.

As an embodiment, the determination unit is further configured toreceive configuration information sent by the network device, theconfiguration information being for configuring the first SRS resourceset for the terminal.

As an embodiment, the configuration information may be born inhigh-layer signaling or MAC signaling.

As an embodiment, the receiving unit is further configured to receive,from the network device, DCI used to schedule the uplink signal, the DCIcontaining the second indication information.

In an optional embodiment, the determination unit 410 may be a processor520, the receiving unit 420 and the sending unit 430 may be acommunication interface 540, and the terminal may further include aninput/output interface 530 and a memory 510, specifically as shown inFIG. 5 .

FIG. 5 is a schematic block diagram of a terminal according to anotherembodiment of the application. The terminal 500 shown in FIG. 5 mayinclude a memory 510, a processor 520, an input/output interface 530 anda communication interface 540. Herein, the memory 510, the processor520, the input/output interface 530 and the communication interface 540may be connected through an internal connecting path. The memory 510 isconfigured to store an instruction. The processor 520 is configured toexecute the instruction stored in the memory 520 to control theinput/output interface 530 to receive input data and information andoutput data such as an operation result and control the communicationinterface 550 to send a signal.

The processor is configured to determine a first SRS resource set.

The communication interface is configured to receive first indicationinformation sent by a network device, the first indication informationbeing used to instruct the terminal to transmit an aperiodic SRS,determine a target SRS resource set according to the first indicationinformation and the first SRS resource set, send the aperiodic SRS tothe network device on an SRS resource in the target SRS resource set andreceive second indication information sent by the network device, thesecond indication information being used to indicate a target SRSresource in the target SRS resource set.

The processor is further configured to determine a transmissionparameter used to transmit an uplink signal according to the target SRSresource.

It is to be understood that, in the embodiment of the application, theprocessor 520 may be a universal Central Processing Unit (CPU), amicroprocessor, an Application Specific Integrated Circuit (ASIC) or oneor more integrated circuits, and is configured to execute a relatedprogram to implement the technical solution provided in the embodimentof the application.

It is also to be understood that the communication interface 540 uses,for example, but not limited to, a transceiver device such as atransceiver to implement communication between the terminal 500 andanother device or a communication network.

The memory 510 may include a read-only memory and a random access memoryand provide an instruction and data for the processor 520. A part of theprocessor 520 may further include a nonvolatile RAM. For example, theprocessor 520 may further store information of a device type.

In an implementation process, each operation of the method may becompleted by an integrated logic circuit of hardware in the processor520 or an instruction in a software form. The method for determining atransmission parameter of an uplink signal in the embodiments of theapplication may be directly executed and completed by a hardwareprocessor or executed and completed by a combination of hardware andsoftware modules in the processor. The software module may be located ina mature storage medium in this field such as a random access memory, aflash memory, a read-only memory, a programmable read-only memory orelectrically erasable programmable read-only memory and a register. Thestorage medium is located in the memory 510. The processor 520 may readinformation in the memory 510 and complete the operations of the methodin combination with hardware. No more detailed descriptions will be madeherein to avoid repetitions.

FIG. 6 is a schematic block diagram of a network device according to anembodiment of the application. The network device 600 shown in FIG. 6includes a receiving unit 610, a determination unit 620 and a sendingunit 630.

The receiving unit is configured to receive an SRS from a terminal on anSRS resource in a first SRS resource set.

The determination unit is configured to determine first indicationinformation according to the SRS, the first indication information beingfurther configured to determine a target SRS transmission resource.

The sending unit is configured to send the first indication informationto the terminal, the first indication information being used to instructthe terminal to transmit an aperiodic SRS.

The receiving unit is further configured to receive the aperiodic SRSfrom the terminal on an SRS resource in a target SRS resource set.

The determination unit is further configured to determine a transmissionparameter used for the terminal to transmit an uplink signal accordingto the target SRS resource.

The sending unit is further configured to send second indicationinformation to the terminal, the second indication information beingused to indicate the target SRS resource in the target SRS resource setand the target SRS resource being configured to determine thetransmission parameter used for the terminal to transmit the uplinksignal.

As an embodiment, the first indication information is used to indicatethe target SRS resource set, and the target SRS resource set is a subsetof the first SRS resource set.

As an embodiment, the first indication information is used to indicate afirst SRS resource in the first SRS resource set, each SRS resource inthe first SRS resource set corresponds to a second SRS resource set, andthe second SRS resource set corresponding to the first SRS resource isthe target SRS resource set.

As an embodiment, the first indication information is used to indicate asecond SRS resource in the first SRS resource set, an index of thesecond SRS resource in the first SRS resource set corresponds to anindex set, and SRS resources corresponding to indexes in the index setcorresponding to the second SRS resource form the target SRS resourceset.

As an embodiment, different beams are adopted for SRS transmission ondifferent SRS resources in the first SRS resource set.

As an embodiment, different beams are adopted for SRS transmission ondifferent SRS resources in the target SRS resource set.

As an embodiment, the transmission parameter is a beamforming weight,and a beamforming weight for SRS transmission on the target SRS resourceis determined as the beamforming weight for transmission of the uplinksignal.

As an embodiment, the transmission parameter is a precoding matrix, andthe sending unit is further configured to send first PMI information tothe terminal. The first PMI information and an antenna port amount ofthe target SRS resource indicate the precoding matrix of the uplinksignal through a mapping relationship among an antenna port amount, PMIinformation and a precoding matrix.

As an embodiment, the receiving unit is further configured to receivethe SRS from the terminal on the SRS resource in the first SRS resourceset, the SRS being a periodic SRS or a quasi-persistent SRS.

As an embodiment, the receiving unit is further configured to receivethe SRS from the terminal on part of antenna ports of the SRS resourcein the first SRS resource set.

As an embodiment, the sending unit is further configured to sendconfiguration information to the terminal, the configuration informationbeing for configuring the first SRS resource set for the terminal.

In an optional embodiment, the determination unit 620 may be a processor720, the receiving unit 610 and the sending unit 630 may be acommunication interface 740, and the network device may further includean input/output interface 730 and a memory 710, specifically as shown inFIG. 7 .

FIG. 7 is a schematic block diagram of a network device according toanother embodiment of the application. The network device 700 shown inFIG. 7 may include a memory 710, a processor 720, an input/outputinterface 730 and a communication interface 740. Herein, the memory 710,the processor 720, the input/output interface 730 and the communicationinterface 740 may be connected through an internal connecting path. Thememory 710 is configured to store an instruction. The processor 720 isconfigured to execute the instruction stored in the memory 720 tocontrol the input/output interface 730 to receive input data andinformation and output data such as an operation result and control thecommunication interface 770 to send a signal.

The communication interface is configured to receive an SRS from aterminal on an SRS resource in a first SRS resource set.

The processor is configured to determine first indication informationaccording to the SRS, the first indication information being furtherconfigured to determine a target SRS transmission resource.

The communication interface is further configured to send the firstindication information to the terminal, the first indication informationbeing used to instruct the terminal to transmit an aperiodic SRS, andreceive the aperiodic SRS from the terminal on an SRS resource in atarget SRS resource set.

The processor is further configured to determine a transmissionparameter used for the terminal to transmit an uplink signal accordingto the target SRS resource.

The communication interface is further configured to send secondindication information to the terminal, the second indicationinformation being used to indicate the target SRS resource in the targetSRS resource set and the target SRS resource being configured todetermine the transmission parameter used for the terminal to transmitthe uplink signal.

It is to be understood that, in the embodiment of the application, theprocessor 720 may adopt a universal CPU, a microprocessor, an ASIC orone or more integrated circuits, and is configured to execute a relatedprogram to implement the technical solution provided in the embodimentof the application.

It is also to be understood that the communication interface 740 uses,for example, but not limited to, a transceiver device such as atransceiver to implement communication between the terminal 700 andanother device or a communication network.

The memory 710 may include a read-only memory and a random access memoryand provides an instruction and data for the processor 720. A part ofthe processor 720 may further include a nonvolatile RAM. For example,the processor 720 may further store information of a device type.

In an implementation process, each operation of the method may becompleted by an integrated logic circuit of hardware in the processor720 or an instruction in a software form. The method for determining atransmission parameter of an uplink signal in the embodiments of theapplication may be directly executed and completed by a hardwareprocessor or executed and completed by a combination of hardware andsoftware modules in the processor. The software module may be located ina mature storage medium in this field such as a random access memory, aflash memory, a read-only memory, a programmable read-only memory orelectrically erasable programmable read-only memory and a register. Thestorage medium may be located in the memory 710. The processor 720 mayread information in the memory 710 and complete the operations of themethod in combination with hardware. No more detailed descriptions willbe made herein to avoid repetitions.

It is to be understood that, in the embodiments of the application, “Bcorresponding to A” represents that B is associated with A and that Bmay be determined according to A. It is also to be understood thatdetermining B according to A does not mean that B is determined onlyaccording to A but that B may also be determined according to A and/orother information.

It is to be understood that term “and/or” in the disclosure is only anassociation relationship describing associated objects and representsthat three relationships may exist. For example, A and/or B mayrepresent three conditions: i.e., independent existence of A, existenceof both A and B and independent existence of B. In addition, character“/” in the disclosure usually represents that previous and nextassociated objects form an “or” relationship.

It is to be understood that, in various embodiments of the application,a magnitude of a sequence number of each process does not mean anexecution sequence and the execution sequence of each process should bedetermined by its function and an internal logic and should not form anylimit to an implementation process of the embodiments of theapplication.

In some embodiments provided by the application, it is to be understoodthat the disclosed system, device and method may be implemented in othermanners. For example, the device embodiment described above is onlyschematic, and for example, division of the units is only logic functiondivision, and other division manners may be adopted during practicalimplementation. For example, multiple units or components may becombined or integrated into another system, or some characteristics maybe neglected or not executed. In addition, coupling or direct couplingor communication connection between each displayed or discussedcomponent may be indirect coupling or communication connection,implemented through some interfaces, of the device or the units, and maybe electrical and mechanical or adopt other forms.

The units described as separate parts may or may not be physicallyseparated, and parts displayed as units may or may not be physicalunits, and namely may be located in the same place, or may also bedistributed to multiple network units. Part or all of the units may beselected to achieve the purpose of the solutions of the embodimentsaccording to a practical requirement.

In addition, each functional unit in each embodiment of the applicationmay be integrated into a processing unit, each unit may also physicallyexist independently, and two or more than two units may also beintegrated into a unit.

The embodiments may be implemented completely or partially throughsoftware, hardware, firmware or any combination thereof. Duringimplementation with software, the embodiments may be implementedcompletely or partially by a computer program product. The computerprogram product may include one or more computer instructions. When thecomputer program instruction is loaded and executed on a computer, theflows or functions according to the embodiments of the application maybe completely or partially generated. The computer may be a universalcomputer, a dedicated computer, a computer network or anotherprogrammable device. The computer instruction may be stored in acomputer-readable storage medium or transmitted from onecomputer-readable storage medium to another computer-readable storagemedium. For example, the computer instruction may be transmitted from aweb site, computer, server or data center to another web site, computer,server or data center in a wired (for example, coaxial cable, opticalfiber and Digital Subscriber Line (DSL)) or wireless (for example,infrared, wireless and microwave) manner. The computer-readable storagemedium may be any available medium readable for the computer or a datastorage device, such as a server and a data center, including one ormore integrated available media. The available medium may be a magneticmedium (for example, a floppy disk, a hard disk and a magnetic tape), anoptical medium (for example, a Digital Video Disc (DVD)), asemiconductor medium (for example, a Solid State Disk (SSD)) or thelike.

The above is only the specific implementation mode of the applicationand not intended to limit the scope of protection of the application.Any variations or replacements apparent to those skilled in the artwithin the technical scope disclosed by the application shall fallwithin the scope of protection of the application. Therefore, the scopeof protection of the application shall be subject to the scope ofprotection of the claims.

The invention claimed is:
 1. A method for determining a transmissionparameter of an uplink signal, comprising: configuring, by a networkdevice, a first SRS resource set for a terminal; sending, by the networkdevice, first indication information to the terminal, the firstindication information being used to instruct the terminal to transmitan aperiodic Sounding Reference Signal (SRS); receiving, by the networkdevice, the aperiodic SRS from the terminal on an SRS resource in atarget SRS resource set, wherein the target SRS resource set isdetermined based on the first indication information and the first SRSresource set; and sending, by the network device, second indicationinformation to the terminal, the second indication information beingused to indicate a target SRS resource in the target SRS resource setand the target SRS resource being used to determine the transmissionparameter for the terminal to transmit the uplink signal.
 2. The methodof claim 1, wherein the first indication information is further used toindicate the target SRS resource set, and the target SRS resource set isa subset of the first SRS resource set.
 3. The method of claim 1,wherein the first indication information is further used to indicate afirst SRS resource in the first SRS resource set, each SRS resource inthe first SRS resource set corresponds to a second SRS resource set, andthe second SRS resource set corresponding to the first SRS resource isthe target SRS resource set.
 4. The method of claim 1, wherein the firstindication information is further used to indicate a second SRS resourcein the first SRS resource set, an index of the second SRS resource inthe first SRS resource set corresponds to an index set, and each SRSresource corresponding to each index in the index set corresponding tothe second SRS resource forms the target SRS resource set.
 5. The methodof claim 1, wherein different beams are adopted for SRS transmission ondifferent SRS resources in the first SRS resource set.
 6. The method ofclaim 1, wherein different beams are adopted for SRS transmission ondifferent SRS resources in the target SRS resource set.
 7. The method ofclaim 1, wherein the transmission parameter is a beamforming weight, andthe beamforming weight for SRS transmission on the target SRS resourceis determined as the beamforming weight for transmission of the uplinksignal.
 8. The method of claim 1, wherein the transmission parameter isa precoding matrix, the method further comprises: sending, by thenetwork device, first Precoding Matrix Indicator (PMI) information tothe terminal, the first PMI information and an antenna port amount ofthe target SRS resource indicating the precoding matrix of the uplinksignal through a mapping relationship among an antenna port amount, PMIinformation and a precoding matrix.
 9. The method of claim 1, whereinconfiguring, by the network device, the first SRS resource set for theterminal comprises: sending, by the network device, configurationinformation to the terminal, the configuration information being forconfiguring the first SRS resource set for the terminal.
 10. The methodof claim 9, wherein the configuration information is indicated byhigh-layer signaling or Media Access Control (MAC) signaling.
 11. Anetwork device, comprising: a processor; and a communication interface,connected with the processor and configured to send and receiveinformation under control of the processor, wherein the communicationinterface is configured to: configure a first Sounding Reference Signal(SRS) resource set for a terminal, send first indication information tothe terminal, the first indication information being used to instructthe terminal to transmit an aperiodic SRS; receive the aperiodic SRSfrom the terminal on an SRS resource in a target SRS resource set,wherein the target SRS resource set is determined based on the firstindication information and the first SRS resource set; and send secondindication information to the terminal, the second indicationinformation being used to indicate a target SRS resource in the targetSRS resource set and the target SRS resource being used to determine atransmission parameter for the terminal to transmit an uplink signal.12. The network device of claim 11, wherein the first indicationinformation is used to indicate the target SRS resource set, and thetarget SRS resource set is a subset of the first SRS resource set. 13.The network device of claim 11, wherein the first indication informationis used to indicate a first SRS resource in the first SRS resource set,each SRS resource in the first SRS resource set corresponds to a secondSRS resource set, and the second SRS resource set corresponding to thefirst SRS resource is the target SRS resource set.
 14. The networkdevice of claim 11, wherein the first indication information is used toindicate a second SRS resource in the first SRS resource set, an indexof the second SRS resource in the first SRS resource set corresponds toan index set, and each SRS resource corresponding to each index in theindex set corresponding to the second SRS resource forms the target SRSresource set.
 15. The network device of claim 11, wherein differentbeams are adopted for SRS transmission on different SRS resources in thefirst SRS resource set; or, different beams are adopted for SRStransmission on different SRS resources in the target SRS resource set.16. The network device of claim 11, wherein the transmission parameteris a beamforming weight, and the beamforming weight for SRS transmissionon the target SRS resource is determined as the beamforming weight fortransmission of the uplink signal.
 17. The network device of claim 11,wherein the transmission parameter is a precoding matrix, thecommunication interface is further specifically configured to: sendfirst Precoding Matrix Indicator (PMI) information to the terminal, thefirst PMI information and an antenna port amount of the target SRSresource indicating the precoding matrix of the uplink signal through amapping relationship among an antenna port amount, PMI information and aprecoding matrix.
 18. The network device of claim 11, wherein thecommunication interface is further configured to: send configurationinformation to the terminal, the configuration information being forconfiguring the first SRS resource set for the terminal.
 19. The networkdevice of claim 18, wherein the configuration information is indicatedby high-layer signaling or Media Access Control (MAC) signaling.
 20. Anon-transitory computer-readable storage medium, storing instructionsexecutable by a processor to implement a method comprising: configuringa first Sounding Reference Signal (SRS) resource set for a terminal;sending first indication information to the terminal, the firstindication information being used to instruct the terminal to transmitan aperiodic SRS; receiving the aperiodic SRS from the terminal on anSRS resource in a target SRS resource set, wherein the target SRSresource set is determined based on the first indication information andthe first SRS resource set; and sending second indication information tothe terminal, the second indication information being used to indicate atarget SRS resource in the target SRS resource set and the target SRSresource being used to determine a transmission parameter for theterminal to transmit an uplink signal.